{
  "manageEntity": {
    "action": "Save",
    "entityId": "266788857",
    "entityType": "Track",
    "nonce": "0x3dbd04c435781482774e25e9e11c77dc4fc6cd1eef7f42dc86823b95a3f91344",
    "signature": "0xb0709c7dc3dfbb9e403c43ca3847d485f32260ce6165e8dd5c3f59ee84bdf4a1735ea003f5ad211fcac208109d66ef8014765087970839f752fd88f5225bbe8d1c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}